[ awr-thos-ti-kee ]
/ ɔrˈθɒs tɪ ki /

noun, plural or·thos·ti·chies. Botany.

a vertical rank or row.
an arrangement of members, as leaves, at different heights on an axis so that their median planes coincide.

Origin of orthostichy

1870–75; ortho- + Greek -stichia alignment, equivalent to stích(os) row (see stich1) + -ia -y3

Related forms

or·thos·ti·chous, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for orthostichy


/ (ɔːˈθɒstɪkɪ) /

noun plural -chies

an imaginary vertical line that connects a row of leaves on a stem
an arrangement of leaves so connected
Compare parastichy

Derived Forms

orthostichous, adjective

Word Origin for orthostichy

C19: from ortho- + Greek stikhos line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012